REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Monday, 25 February 2019

HAIER RGBTV - 25F99 SERVICE MODE AND ADJUSTMENTS

HAIER RGBTV - 25F99 SERVICE MODE AND ADJUSTMENTS



SERVICE MODE, ADJUSTMENT ITEMS & DATA VALUES

To enter service mode, switch ON the set, and press [P.STD => S.STD => CALL => POWER] keys on the remote control in sequence.  Never allow time out of 5 seconds between each presses.

  • Press 'Menu" button for selection.
  • Press P+ or CH+ buttons to adjust the item to adjust.
  • Press Vol + / - button to adjust the data value to selected item.
  • Press 1 to 6 buttons for quick selection of Menus 1 to 6.
  • Press button [9] to select OSD sync: signal cathode.
  • Press AV/TV to switch from AV to TV.
  • Press 'Mute' button to select or deselect Mute.
  • Press power button to switch OFF the device.
  • Press other buttons to deactivate the service menu.
If [2] (Geometry) is selected, a half image or full image can be displayed in rotation if button [8] is pressed. 
If [3] (Picture) is selected, a horizontal line can be displayed or removed if [0] button is pressed.
Service menu-1 |  ITEM, SPECIFICATION, RANGE & DEFAULT VALUES.
  1. AGC => RF AGC DELAY => 0 TO 3FH => 14
  2. VCO => INTERMEDIATE FREQUENCY CORRECTION => 0 TO 5 => 02(Not adjustable)
  3. YDL => Y DELAY COMPENSATION TV => 0 TO 8 => 04 (Not adjustable).
VCO [03] corresponds to IF 38.0MHz.
Service menu -2 | ITEM, SPECIFICATIONS, RANGE & DEFAULT VALUE
  1. PSL/NSL => FIELD PITCH CORRECTION => 0 TO 3FH.
  2. PVS/NVS => FIELD CENTER CORRECTION => 0 TO 3FH.
  3. PVA/NVA => FIELD RANGE CORRECTION => 0 TO 3FH.
  4. PHS/NHS => LINE CENTER CORRECTION => 0 TO 3FH.
  5. PEW/NEW => LINE WIDTH CORRECTION => 0 TO 3FH.
  6. PEP/NEP => PINCUSHION CORRECTION => 0 TO 3FH.
  7. PEC/NEC => 4-CORNER DISTORTION CORRECTION => 0 TO 3FH.
  8. PET/NET => TRAPEZIUM CORRECTION => 0 TO 3FH.
  9. PSC/NSC => FIELD S-CORRECTION => 0 TO 3FH.
S-Correction is adjusted according to the curvature of the kinescope, and kinescopes of the same model will have same S-Correction data value.
Geometry correction will be automatically classified according to the 50|60 systems currently recognized.  

  • RG => R-PUMPING => 0 TO 3FH.
  • GG => G-PUMPING => 0 TO 3FH.
  • BG => B-PUMPING => 0 TO 3 FH.
  • SBT => SECONDARY BRIGHTNESS => 0 TO 3 FH => 3A.
  • SCT => SECONDARY CONTRAST => 0 TO 3FH => 3A.
  • SCR => SECONDARY CHROMA => 0 TO 3FH => 3A.
  • STT => N-SECONDARY TONALITY => 0 TO 3FH => 3A.
  • CDL => CATHODE DRIVE LEVEL => 0 TO 7FH => 85.
Posted By: FRANK at 02:23
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